S-91255A274 10-32 x 1 1/4" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance under high-stress conditions, reducing failure risks in demanding applications.
• Precision Class 3A thread fit provides superior engagement and vibration resistance, minimizing loosening in critical assemblies.
• Black-oxide finish on alloy steel offers enhanced corrosion resistance and durability, extending service life in harsh environments.
• Rockwell C39 hardness delivers excellent wear resistance, maintaining thread integrity through repeated installations.
• 1/8" hex drive with rounded button head allows for easy installation and a low-profile, snag-resistant design.
• Fully threaded fine UNF design ensures maximum grip and load distribution across the entire 1 1/4" length.
• Compliance with ASME, ASTM, RoHS, and REACH guarantees material safety and interoperability in regulated industries.

Professional Applications & Engineering Value

Engineered for precision and reliability, these 10-32 UNF Class 3A threaded screws with black-oxide alloy steel construction address common industrial challenges such as vibration-induced loosening and corrosion. The fine thread spacing and fully threaded design provide superior clamping force in applications like machinery assembly, automotive components, and electronic enclosures, where consistent torque and high tensile strength are critical. The rounded button head and hex drive facilitate quick, secure fastening in confined spaces, reducing installation time while maintaining a clean aesthetic. Ideal for OEM and MRO use, these screws ensure long-term performance in environments requiring RoHS and REACH compliance.

Specification Summary & Compliance

This screw features a 10-32 UNF thread with Class 3A tolerance for precise fit, right-hand direction, and fine spacing. Manufacturing adheres to ASME B18.3 and ASTM F835 specifications, ensuring dimensional accuracy and material consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting use in environmentally conscious and global supply chains.